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Note 6 - Other Comprehensive Income - Accumulated Other Comprehensive Loss Balances (Details)
9 Months Ended
Sep. 30, 2019
USD ($)
Balance $ 6,255,729
Balance 1,947,215
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]  
Balance (6,050,347)
Accumulated Other Comprehensive Loss, Current period change 15,603
Balance (6,034,744)
AOCI Attributable to Parent [Member]  
Balance (6,050,347)
Accumulated Other Comprehensive Loss, Current period change 15,603
Balance $ (6,034,744)